100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
HLTH 501 Biostatistics Study Guide t=with 100- correct answers $14.49
Add to cart

Exam (elaborations)

HLTH 501 Biostatistics Study Guide t=with 100- correct answers

 0 purchase
  • Course
  • HLTH 501
  • Institution
  • HLTH 501

HLTH 501 Biostatistics Study Guide t=with 100- correct answers

Preview 4 out of 73  pages

  • December 3, 2024
  • 73
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • HLTH 501
  • HLTH 501
avatar-seller
FREEMANSHARP
HLTH 501 Biostatistics Study
Guide t=with 100% correct
answers
Point prevalence (PP)
=number of persons with disease/number of persons examined at
baseline
Risk difference (RD)
=PPexposed-PPunexposed;
CIexposed-CIunexposed;
IRexposed-IRunexposed
Cumulative Incidence (CI)
=number of persons who develop disease during a specified
period/number of persons at risk at baseline
Population Attributable Risk (PAR)
=PPoverall-PPunexposed/PPoverall;
CIoverall-CIunexposed/CIoverall;
IRoverall-IRunexposed/IRoverall
Odds ratio (OR)
=PPexposed/(1-PPexposed)//PPunexposed/(1-PPunexposed);

CIexposed/(1-CIexposed)//CIunexposed/(1-CIunexposed)
relative risk (RR)
=PPexposed/PPunexposed;

CIexposed/CIunexposed
incidence rate (IR)
=number of persons who develop disease during a specified
period/sum of the length of time during which persons are disease
free

,Standard deviation (s)




mean (x)




median for odd




The best numerical summaries for dichotomous, ordinal, and
categorical variables are relative frequencies.
True
Two types of medical devices used for knee replacement are being
studied to see if the type of knee replacement used affects the rate
of infection for a specific bacterial infection. The infection rate for a
specific bacterial infection after surgery for device A is 0.0043. The
rate for the same bacterial infection is 0.0121 for device B. How
does the risk of developing the bacterial infection in individuals
using device B compare to the risk of developing the bacterial
infection in individuals using device A?
Individuals using device B are 2.814 times more likely to develop
the bacterial infection of interest than individuals using device A.
Confounding is usually a major issue in cohort studies.
True
The population attributable risk is usually expressed as a
percentage and ranges from 0% to 100%.

,True
The Cumulative incidence is computed as the number of persons
who develop a disease during a specified period over the number of
persons examined at baseline
False
A nested case-control study is a specific type of case-control study
that is usually designed from a cohort study.
True
A design that is a very detailed report of the specific features of a
particular participant or case is known as?
Case report
Calculate the mean blood glucose level for a study measuring the
blood glucose levels of 10 individuals whose blood glucose readings
were as follows: 88, 97, 101, 104, 104, 107, 109, 117, 121, and 147.
109.5
Which type of study design can assess temporal relationship?
A cohort study
In a study, some patients were not followed for a total of 10 years.
Some suffered events (i.e., developed coronary artery disease
during follow-up), whereas others dropped out of the study. The
following table displays the total number of person-years of follow-
up in each group.

Number with Coronary Artery Disease

Total Follow-Up (years)
High Blood Pressure medication
16
3200
Placebo
28
2750

The incidence rate of coronary artery disease in patients receiving
the new medication (High Blood Pressure medication) is
approximately:

, 5 per 1000 person-years
The applicability of the research results to a specific population
obtained from a biostatistics study is best determined by which of
the following?
The inclusion and exclusion criteria of the study
A study that is conducted at a single point in time is known as:
A cross-sectional study
The median of a group of individuals' BMIs whose BMIs are 20.47,
21.92, 23.32, 23.41, 25.7, and 30.1 is approximately 24.15.
False
The term clinical means that the study involves people.
True
The best measure of central tendency for systolic blood pressure
readings obtained from a population of 7 individuals whose systolic
blood pressure readings were 101, 104, 108, 109, 111, 112, and 160
is the mean.
False
1,000 people are enrolled in a 10-year cohort study. At the start of
the study, 100 have diagnosed CVD. Over the course of the study, 80
people who were free of CVD at baseline develop CVD. What is the
cumulative incidence at 10 years?
0.089
Incidence of disease is the proportion of individuals with the
condition (disease) at a single point in time
False
Clinical trials are regulated in the United States by the
Environmental Protection Agency.
False
The measure of uncertainty in a biostatistician's calculation of a
particular outcome that may result from using a subset of the
population to estimate the actual likelihood of the event occurring
in the population as a whole is referred to by what statistical term?
A margin of error

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller FREEMANSHARP. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $14.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

67937 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling
$14.49
  • (0)
Add to cart
Added